/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache License, Version 2.0 (the

  * "License"); you may not use this file except in compliance

  * with the License.  You may obtain a copy of the License at

  *

  *     http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.apache.giraph.comm.requests;

 import org.apache.giraph.comm.ServerData;

 import org.apache.giraph.edge.Edge;

 import org.apache.giraph.utils.ByteArrayVertexIdEdges;

 import org.apache.giraph.utils.PairList;

 import org.apache.giraph.utils.VertexIdEdges;

 import org.apache.hadoop.io.Writable;

 import org.apache.hadoop.io.WritableComparable;

 /**

  * Send a collection of edges for a partition.

  *

  * @param <I> Vertex id

  * @param <E> Edge data

  */

 @SuppressWarnings("unchecked")

 public class SendWorkerEdgesRequest<I extends WritableComparable,

     E extends Writable>

     extends SendWorkerDataRequest<I, Edge<I, E>,

     VertexIdEdges<I, E>> {

   /**

    * Constructor used for reflection only

    */

   public SendWorkerEdgesRequest() { }

   /**

    * Constructor used to send request.

    *

    * @param partVertEdges Map of remote partitions =>

    *                     ByteArrayVertexIdEdges

    */

   public SendWorkerEdgesRequest(

       PairList<Integer, VertexIdEdges<I, E>> partVertEdges) {

     this.partitionVertexData = partVertEdges;

   }

   @Override

   public VertexIdEdges<I, E> createVertexIdData() {

     return new ByteArrayVertexIdEdges<>();

   }

   @Override

   public RequestType getType() {

     return RequestType.SEND_WORKER_EDGES_REQUEST;

   }

   @Override

   public void doRequest(ServerData serverData) {

     PairList<Integer, VertexIdEdges<I, E>>.Iterator

         iterator = partitionVertexData.getIterator();

     while (iterator.hasNext()) {

       iterator.next();

       serverData.getEdgeStore()

           .addPartitionEdges(iterator.getCurrentFirst(),

               iterator.getCurrentSecond());

     }

   }

 }